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紫外光接枝丙烯酸改性废胶粉工艺优化及其复合材料的力学性能
引用本文:丁国新,夏明,张智敏,王彬.紫外光接枝丙烯酸改性废胶粉工艺优化及其复合材料的力学性能[J].机械工程材料,2012(8):55-58.
作者姓名:丁国新  夏明  张智敏  王彬
作者单位:安徽理工大学材料科学与工程学院
基金项目:安徽省高校省级优秀青年人才基金资助项目(2009SQRZ066);安徽理工大学2010年度青年教师科学研究基金资助项目
摘    要:以丙烯酸为接枝单体,二苯甲酮为光敏剂,在紫外光的引发下对废胶粉进行表面接枝,用正交方法对改性工艺进行了优化,制备了改性废胶粉/天然橡胶复合材料,表征了改性前后废胶粉的表面形貌和结构,考察了其加入量对复合材料力学性能的影响。结果表明:当丙烯酸和二苯甲酮与废胶粉的质量比分别为10%和9%,废胶粉粒径为150μm和光照时间为4min时,为最佳工艺条件,此时接枝率最高,达3.38%;接枝改性后的废胶粉表面粗糙度增加;随改性废胶粉含量的增加,复合材料的拉伸强度和邵氏A硬度先增大后降低,并在质量分数10%时达到最大值,分别为27.28MPa和69.2HSA。

关 键 词:废胶粉  丙烯酸  紫外光  天然橡胶  力学性能

Process Optimization of UV-induced Photografting Acrylic Acid onto Waste Rubber Powder and Mechanical Property of the Composite
DING Guo-xin,XIA Ming,ZHANG Zhi-min,WANG Bin.Process Optimization of UV-induced Photografting Acrylic Acid onto Waste Rubber Powder and Mechanical Property of the Composite[J].Materials For Mechanical Engineering,2012(8):55-58.
Authors:DING Guo-xin  XIA Ming  ZHANG Zhi-min  WANG Bin
Affiliation:(School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)
Abstract:The surface of waste rubber powder(WRP) grafted with acrylic acid(AA) was performed under the inducing of ultraviolet(UV) using benzophenone(BP) as photosensitizer.The fabrication parameters were optimized via orthogonal method.The modified WRP/natural rubber(NR) composites were fabricated.The surface morphology and structures of WRP before and after modified,and the effects of WRP content on the mechanical properties of WRP/NR composites were studied.Results show that the highest grafting degree of 3.38% was gained in the optimized condition with 10wt% AA,9wt% BP,150 μm grain size of WRP and 4 min of illumination time.The rougher surface of modified WRP was observed when compared with the unmodified samples.The tensile strength and Shore A hardness were increased first,and then decreased with the content of modified WRP increased,and the peak values(27.28 MPa and 69.2 HSA,respectively) were obtained when 10wt% WRP added.
Keywords:waste rubber powder  acrylic acid  ultraviolet  natural rubber  mechanical properties
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